CIRCULATION OF HYDROXYL AMINE-CONTAINING STRIPPER SOLUTION

摘要

PROBLEM TO BE SOLVED: To provide a method capable of easily treating a hydroxyl amine- containing waste liquid used for cleaning electronic parts and reusing each component contained in the waste liquid after a purification process to use in a production process in an electronics industry world. SOLUTION: A hydroxyl amine-containing liquid 2 is passed through a fractionation column 1 and stripped with steam 3 by a counter current method to obtain a hydroxyl amine aqueous solution 7 from a column top part. The aqueous solution is easily degraded because of the poor stabilization effect. An amine aqueous solution 8 is obtained from the column bottom part.